U.S. patent application number 12/632220 was filed with the patent office on 2010-06-17 for composite anchor.
This patent application is currently assigned to Smith & Nephew, Inc.. Invention is credited to Richard Lunn, David A. Paulk.
Application Number | 20100152773 12/632220 |
Document ID | / |
Family ID | 41479267 |
Filed Date | 2010-06-17 |
United States Patent
Application |
20100152773 |
Kind Code |
A1 |
Lunn; Richard ; et
al. |
June 17, 2010 |
Composite Anchor
Abstract
The present disclosure relates to a composite anchor. The anchor
includes a cannulated proximal portion having a threaded outer
surface and a distal portion coupled to the proximal portion, the
distal portion including a top portion, a bottom portion, and a
through hole, wherein the top portion is configured to be disposed
within the cannulation of the proximal portion.
Inventors: |
Lunn; Richard; (Kingston,
MA) ; Paulk; David A.; (Hopedale, MA) |
Correspondence
Address: |
NORMAN F. HAINER, JR.;SMITH & NEPHEW, INC.
150 MINUTEMAN ROAD
ANDOVER
MA
01801
US
|
Assignee: |
Smith & Nephew, Inc.
Andover
MA
|
Family ID: |
41479267 |
Appl. No.: |
12/632220 |
Filed: |
December 7, 2009 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
61122512 |
Dec 15, 2008 |
|
|
|
Current U.S.
Class: |
606/232 |
Current CPC
Class: |
A61B 2017/0464 20130101;
A61B 2017/0445 20130101; A61B 2017/044 20130101; A61B 2017/0448
20130101; A61B 2017/0451 20130101; A61B 2017/0458 20130101; A61B
17/0401 20130101 |
Class at
Publication: |
606/232 |
International
Class: |
A61B 17/04 20060101
A61B017/04 |
Claims
1. A composite anchor comprising: a cannulated proximal portion
comprising a threaded outer surface; and a distal portion coupled
to the proximal portion, the distal portion comprising a top
portion, a bottom portion, and a through hole, wherein the top
portion is configured to be disposed within the cannulation of the
proximal portion.
2. The anchor of claim 1 wherein the top portion of the distal
portion comprises at least two sides and a middle portion located
between the at least two sides.
3. The anchor of claim 1 wherein the bottom portion is
substantially cone-shaped.
4. The anchor of claim 2 wherein the at least two sides arc
substantially trapezoid-shaped and the middle portion is
substantially round.
5. The anchor of claim 1 wherein the through hole is located in the
bottom portion of the distal portion.
6. The anchor of claim 1 wherein the anchor further comprises at
least one suture disposed within the through hole and extending
through the cannulation of the proximal portion.
7. A method of repair comprising: providing a composite anchor
comprising a cannulated proximal portion; a distal portion coupled
to the proximal portion, the distal portion comprising a top
portion, a bottom portion, and a through hole, wherein the top
portion is configured to be disposed within the cannulation of the
proximal portion; and at least one suture disposed within the
through hole and extending through the cannulation of the proximal
portion; inserting the anchor into bone; placing soft tissue over
the hole and inserting the suture through the soft tissue; and
tying the suture to fixate the soft tissue to the bone.
8. The method of claim 7 wherein the anchor is inserted into the
bone via rotary advancement of the anchor.
9. The method of claim 7 further comprising creating a hole in the
bone prior to inserting the anchor into the bone.
10. The method of claim 7 wherein the proximal portion comprises a
threaded outer surface.
11. The anchor of claim 1 wherein both the proximal portion and the
distal portion include absorbable material.
12. The anchor of claim 1 wherein the proximal portion includes
absorbable material and the distal portion includes non-absorbable
material.
13. The anchor of claim 12 wherein the absorbable material includes
a polymer material and the non-absorbable material includes a
polymer material.
14. The anchor of claim 12 wherein the absorbable material includes
a polymer material and the non-absorbable material includes a metal
material.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims the benefit of U.S. patent
application Ser. No. 61/122512, filed on Dec. 15, 2008, the
disclosure of which is incorporated herein by reference in its
entirety.
BACKGROUND
[0002] 1. Field of Technology
[0003] The present disclosure relates to devices and methods for
repairing tissue.
[0004] 2. Related Art
[0005] Arthroscopic procedures often require soft tissue to be
reattached to bone. To achieve this, anchors are placed in the bone
and sutures attached to the anchor are passed through the tissue to
securely retain the tissue in place. The anchors may be of a
one-piece design or may be of a multiple piece design. These
anchors may be made from a material that allows the anchor to be
absorbed by the body over time. However, suture anchors made from
such absorbable material may not allow for the tissue to be held
securely against the bone during the degradation of the anchor,
thereby not allowing for reattachment of the tissue to the bone. In
addition, these anchors don't allow for enough surface contact
between the anchor and the device used to insert the anchor into
bone, thereby reducing the ability of the user from applying a high
amount of torque to the anchor. As a result, the user is forced to
create a hole in the bone prior to insertion of the anchor, thereby
adding procedural steps and time to the surgery.
SUMMARY
[0006] In one aspect, the present disclosure relates to a composite
anchor. The anchor includes a cannulated proximal portion having a
threaded outer surface and a distal portion coupled to the proximal
portion, the distal portion including a top portion, a bottom
portion, and a through hole, wherein the top portion is configured
to be disposed within the cannulation of the proximal portion.
[0007] In an embodiment, the top portion of the distal portion
comprises at least two sides and a middle portion located between
the at least two sides. In another embodiment, the bottom portion
is substantially cone-shaped. In yet another embodiment, the at
least two sides are substantially trapezoid-shaped and the middle
portion is substantially round. In a further embodiment, the
through hole is located in the bottom portion of the distal
portion. In yet a further embodiment, the anchor further includes
at least one suture disposed within the through hole and extending
through the cannulation of the proximal portion.
[0008] In an embodiment, both the proximal portion and the distal
portion include absorbable material. In another embodiment, the
proximal portion includes absorbable material and the distal
portion includes non-absorbable material. In yet another
embodiment, the absorbable material includes a polymer material and
the non-absorbable material includes a polymer material. In a
further embodiment, the absorbable material includes a polymer
material and the non-absorbable material includes a metal
material.
[0009] In another aspect, the present disclosure relates to a
method of repair. The method includes providing a composite anchor
including a cannulated proximal portion; a distal portion coupled
to the proximal portion, the distal portion including a top
portion, a bottom portion, and a through hole, wherein the top
portion is configured to be disposed within the cannulation of the
proximal portion; and at least one suture disposed within the
through hole and extending through the cannulation of the proximal
portion; inserting the anchor into bone; placing soft tissue over
the hole and inserting the suture through the soft tissue; and
tying the suture to fixate the soft tissue to the bone.
[0010] In an embodiment, the anchor is inserted into the bone via
rotary advancement of the anchor. In another embodiment, the method
further includes creating a hole in the bone prior to inserting the
anchor into the bone. In yet another embodiment, the proximal
portion comprises a threaded outer surface.
[0011] Further areas of applicability of the present disclosure
will become apparent from the detailed description provided
hereinafter. It should be understood that the detailed description
and specific examples, while indicating the preferred embodiment of
the disclosure, are intended for purposes of illustration only and
are not intended to limit the scope of the disclosure.
BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The accompanying drawings, which are incorporated in and
form a part of the specification, illustrate the embodiments of the
present disclosure and together with the written description serve
to explain the principles, characteristics, and features of the
disclosure. In the drawings:
[0013] FIG. 1 shows a perspective view of the composite anchor of
the present disclosure.
[0014] FIG. 2 shows a perspective view of the proximal portion of
the composite anchor of FIG. 1.
[0015] FIG. 3 shows a cross-sectional view of the proximal portion
of FIG. 2.
[0016] FIG. 4 shows a perspective view of the distal portion of the
composite anchor of FIG. 1.
[0017] FIG. 5 shows a cross-sectional view of the composite anchor
of FIG. 1.
[0018] FIGS. 6A-6C show a method of repair via use of the composite
anchor of FIG. 1.
DETAILED DESCRIPTION OF THE EMBODIMENTS
[0019] The following description of the preferred embodiment(s) is
merely exemplary in nature and is in no way intended to limit the
disclosure, its application, or uses.
[0020] FIGS. 1-5 show the composite anchor 10 of the present
disclosure. The anchor 10 includes a proximal portion 11 and a
distal portion 12 coupled to the proximal portion 11. The proximal
portion 11 includes a cannulation 11a, an inner surface 11b that is
configured to house the distal portion 12 and a delivery device
(not shown) that is used to insert the anchor 10 into bone, as will
he further described below, and an outer surface 11e that includes
threads 11d. The distal portion 12 includes a bottom portion 12a, a
top portion 12b, and a through hole 12c located in the bottom
portion 12a. The bottom portion 12a is substantially
conically-shaped to allow for easier insertion of the anchor 10
into bone, as will be further described below. The top portion 12b
includes at least two sides 12d and a middle portion 12e located
between the at least two sides 12d. The sides 12d are
trapezoidal-shaped and the middle portion 12e is substantially
rounded. As shown in FIG. 5, the shape of the sides 12d conforms to
the shape of the inner surface lib so as to allow the sides 12d to
engage the inner surface 11b and thereby couple the distal portion
12 to the proximal portion 11, when the distal. portion 12 is
placed within the cannulation 11a of the proximal portion 11.
[0021] FIGS. 6A-6C show a method of repair via use of the composite
anchor of the present disclosure. As shown in FIG. 6A, the anchor
10 includes at least one suture 20 housed within the through hole
12c and having ends 20a,20b extending through the cannulation 11a
of the proximal portion 11 such that the suture 20 is disposed on
the middle portion 12e. The anchor 10 is inserted into bone 30 via
rotary advancement through use of a delivery device 40, as shown in
FIG. 6B. The delivery device 40 extends a substantial length of the
proximal portion 11, thereby providing a sufficient amount of
surface contact between the anchor 10 and the delivery device 40 to
allow the user to apply a higher amount of torque to the anchor 10
than would be allowed if the delivery device 40 extended less than
a substantial length of the proximal portion 11. The ability to
apply a higher amount of torque to the anchor 10 allows the user to
insert the anchor 10 into the bone 30, especially hard bone, such
as cortical bone, without first creating a hole in the bone 30
prior to inserting the anchor 10, thereby saving time during
surgery.
[0022] After placement of the anchor 10 into the bone 30, the
delivery device 40 is removed and a soft tissue 50 is placed on the
bone 30 lying adjacent to the anchor 10. The suture ends 20a,20b
are then inserted through the soft tissue 50 and tied to fixate the
soft tissue 50 to the bone 30, as shown in FIG. 6C.
[0023] For the purposes of this disclosure, the proximal portion.
11 includes an absorbable material, such as an absorbable polymer
material, and the distal portion 12 includes a non-absorbable
material, such as a non-absorbable polymer material or a metal
material. Any absorbable polymer material may be used. An
absorbable material that includes a filler, such as calcium
sulfate, calcium carbonate, calcium phosphate, fibers, or other
filler material that would provide for increased strength,
osteoconductivity, decreased pH level of the polymer, or other
benefits, may be used. A non-absorbable polymer material, such as
polyetheretherketone (PEEK), or other non-absorbable polymer
material could be used. Likewise, the metal material may include
stainless steel, titanium, or another metal material known to one
of skill in the art.
[0024] It is believed that an anchor 10 having an absorbable
proximal portion 11 and a non-absorbable distal portion 12 would
substantially reduce the possibility of the soft tissue 50 becoming
loose during degradation of the proximal portion 11. In addition,
having an anchor with a composite arrangement provides the surgeon
with more selection in the type of anchor that is used during
surgery. Current two piece suture anchors consist entirely of a
metal material or a non-metal material.
[0025] For the purposes of this disclosure, the proximal portion 11
of the anchor 10 and the distal portion 12 of the anchor 10 are
coupled via an interference fit between the proximal portion 11 and
the distal portion 12. However, the components 11,12 may be coupled
via ultrasonic welding or another coupling method known to one of
skill in the art. In addition, it is possible for the inner surface
11b, sides 12d, the middle portion 12e, and the bottom portion 12a
to have a different shape. Also, features other than threads may be
present on the outer surface 11c of the proximal portion 11.
Rather, the outer surface 11c may include barbs or other surface
features that allow for axial advancement of the anchor 10 into the
bone 30. Furthermore, more than one suture may be disposed within
the through hole 12c and through the cannulation 11a. Even more, a
hole may be formed in the bone 30 prior to inserting the anchor 10
into the bone 30.
[0026] As various modifications could be made to the exemplary
embodiments, as described above with reference to the corresponding
illustrations, without departing from the scope of the disclosure,
it is intended that all matter contained in the foregoing
description and shown in the accompanying drawings shall be
interpreted as illustrative rather than limiting. Thus, the breadth
and scope of the present disclosure should not be limited by any of
the above-described exemplary embodiments, but should be defined
only in accordance with the following claims appended hereto and
their equivalents.
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